Prototype L2387 in 'B condition' markings and faired-over (or mock-up) turret after its first flight on June 18, 1937. The film used makes its overall yellow colour scheme look dark and the roundels 'reversed'.

In its communications form, the Don was an elegant aircraft. The wing root leading edge intakes to cool the engine are apparent. Illustrated is the infortunate L2391 shortly after its first flight on June 13, 1938.